Alpha boss locations
90 alpha bosses, each at the exact spot the game places it, from level 11 up to 79. These are drawn from the spawner coordinates rather than from anyone walking the map, which is why the ones on the World Tree are here too.

83 alphas shown. Click a pin for the Pal.
Every alpha, by level
Fighting them
An alpha is the same Pal with a much larger health pool and a level well above the area around it, so the element matchup does more work than your gear does — the type chart is the thing to check before you walk up to one. They are catchable, and at these levels the capture calculator is worth a look before you spend spheres.
Why these pins can be trusted
This site withheld boss coordinates for a long time. They were always in the files, but the values are Unreal world units and the transform onto the map people actually look at was unverified — a pin in the wrong place is worse than no pin, because it looks just as confident.
What changed is that the transform is now the game’s own landscape rectangle, the same one the spawn map uses. The boss table then corroborates it without being asked to: of 159 spawners, 152 fall inside the main island’s rectangle and the other 7 fall inside the World Tree’s, with none left over. A wrong projection scatters points outside both.
69 further spawner rows carry no assigned boss at all. Those are skipped rather than drawn as anonymous pins.
Extracted from Palworld’s game files on (build 4797106687).